Chapter 2 Theory Of Operation; Overall - Brother HL-5240 Service Manual

CHAPTER 2
1.

OVERALL

1.1 General Block Diagram
Fig. 2-1 shows a general block diagram.
Control system
Image generation system
THEORY OF OPERATION
Extended RAM
SODIMM 144pin
RAM
16MB: HL-5240
32MB: HL-5250DN/
5270DN/
5280DW
Video control block
Engine control block
Laser unit
Drum unit
Transfer block
Charging
Exposure
drum
block
Developer unit
Developing block
Toner cartridge
HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
USB host
(HL-5280DW)
Ethernet
10/100 Base TX
(HL-5250DN/
5270DN/5280DW)
Interface block
USB
Parallel
Operation block
(Control panel)
Drive block
(DC motor)
Paper dust
cleaner block
Fig. 2-1
2-1
Wireless LAN
(HL-5280DW)
Paper tray
Fuser unit
Paper eject tray
Paper feed system
Confidential